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Polk Audio db651s

6-1/2" 2-way shallow-mount car speakers

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Our take on the Polk Audio db651s

by Leigh Schoettinger
Polk Audio

Why replace your car's original speakers?

The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.

Good music becomes great when you hear it through Polk's db Series car speakers. Polk engineers use laser imaging to determine the ideal combination of speaker materials and design to eliminate distortion. The resulting technology produces speakers with smooth frequency response, sharp detail, and the ability to play music at high volumes without strain.

Polk's db651s shallow-mount speakers feature 6-1/2" woofers made from a polymer/mica composite and durable rubber surrounds that stand up to heat and moisture. Liquid-cooled 3/4" silk/polymer dome tweeters use powerful Neodymium magnets to deliver precise high-frequency reproduction. With a 2" mounting depth, these speakers can fit into some tight places. The built-in two-way crossovers keep the high and low frequencies flowing to the proper drivers for seamless, efficient audio.

These speakers feature stainless steel mounting hardware and muscular ABS grilles that will add a stylish touch to your car's interior.

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Highlights:

  • 6-1/2" 2-way car speakers for shallow mounts
  • Dynamic Balance polymer/mica composite woofer with butyl rubber surround
  • 3/4" liquid-cooled silk/polymer composite dome tweeter
  • Neodymium tweeter magnet
  • Kapton voice coil
  • built-in 2-way crossover network
  • ABS wheel-design grilles
  • stainless steel mounting hardware
  • power range: 6-55 watts RMS (165 watts peak power)
  • frequency response: 50-22,000 Hz
  • sensitivity: 92 dB
  • top-mount depth: 2"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Priced per pair

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Design 2-way
Tweeter Design 3/4" Dome
Tweeter Composition Silk/Polymer composite
Woofer Composition Polymer/Mica composite
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity 92 dB at 1 watt
Frequency Response 50 - 22k Hz
RMS Power Range (Watts) 6-55
Peak Power Handling (Watts) 165
Impedance (Ohms) 4
Top-mount Depth (Inches) 2
Bottom-mount Depth (Inches) 2 5/16
Cutout Diameter or Length (inches) 4 15/16
Product Research
What's in the box?

Download owner's manual

  • Two 2-way speakers
  • 2 Grilles
  • 8 Self-tapping screws (length=1")
  • 8 Speed clips
  • 2 Foam rubber gaskets
  • Owner's Manual (Eng/Span/Fren/Ger/Ita/Port)
  • Online registration sheet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.

Woofer Cones: Each speaker features a Dynamic Balance polymer/mica composite mineral-filled cone. The cones are stiff and lightweight for big sound and low distortion.

Butyl Rubber Surrounds: For a smoother response and improved durability, the woofers use butyl rubber surrounds.

Kapton Voice Coil Former: The low-mass Kapton Voice Coil former is lightweight for high sound output. Kapton's high melting temperature (725°F) ensures high power handling and longer reliability.

Silk/Polymer Composite Tweeters: The 3/4" liquid-cooled, silk/polymer composite tweeters provide clear, detailed highs. The tweeters use neodymium magnets.

2-way Crossover Network: The built-in 2-way crossover network sends the appropriate frequencies to each driver for cleaner sound and better imaging.

Grilles: Strong ABS plastic grilles are included. These computer optimized grilles are based on exclusive MOMO designs.

 

Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Polk Audio db Car Speakers

Video: Polk Audio db Car Speakers

by Ken Nail, J.R. Stoffel
 
Video: Polk Audio db Car Speakers

Learn about the features that make Polk Audio db series car speakers a popular choice for improved sound.

 
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Polk Audio db651s Reviews

Average Customer Review:

477 people say:

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5 out of 5

Awesome bass.

Written By KW, Norfolk, VA on Monday, October 27, 2014
Crutchfield Customer Review (What's this?)
 
For the price, you won't find a better speaker. The bass from these is incredible.
Pros:
The price for these speakers is awesome. Buy them you won't regret it.
Cons:
None
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4 out of 5

Great Sound

Written By chrisc, Flagstaff, AZ on Tuesday, October 14, 2014
Crutchfield Customer Review (What's this?)
 
Fantastic sounding speakers. The mids and highs really shine through making music sound crisp and clean. Would recommend to anyone looking to boost stock system. My only complaint is that i saw these speakers for almost half the price online.
Pros:
sound amazing, solid build quality.
Cons:
$$$$
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5 out of 5

Polk Audio db651s

Written By Ron, Hampton, VA on Tuesday, October 14, 2014
Crutchfield Customer Review (What's this?)
 
Replaced factory JBL front and rear door speakers in 2003 Toyota Avalon. The difference is like night and day. This is my first experience with Polk Audio Products. So far so good.
Pros:
Great Price
Cons:
None
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5 out of 5

Excellent Sonics and Service

Written By Frankonwheels, Orlando, FL on Tuesday, October 07, 2014
Crutchfield Customer Review (What's this?)
 
I got these for my daughter's Kia Rio, and we couldn't be happier. Solid, genuine acoustic engineering goes into the design of Polk speakers, and it's reflected in their sound...great dynamics and tonal integrity. As far as low frequency performance, I've often read reviews here complaining about bass response of the car speakers they've purchased, manufacturer not withstanding. These folks need to realize that they install these relatively small speakers into doors and side panels, these are typically free-air environments. Without a sealed or vented enclosure behind the speaker, there is nothing to reinforce the low-frequency response...you simply can't expect anything much below around 60 hertz or so in these situations. It's got nothing to do with the brand of speaker, so give 'em a break for crying out loud. I'd also like to mention that I'm paraplegic, and a while back I'd bought a set of Polk db 6x9's to put in the modified van that I drive from my wheelchair. I had a friend of mine install them for me and when he was tightening a screw, the screwdriver slipped and punched a hole in the cone. I called Polk and explained what had happened and asked how much a new speaker would be, since you generally can't buy them individually. He just asked me to give him my address so that he could ship out a replacement speaker for me! That is the kind of customer service that inspires lifelong brand-loyalty. Needless to say, we've got Polk speakers throughout our home and cars.
Pros:
Build quality (I don't know why some mfg's still use foam surrounds on their speakers..bound to rot and fall apart), tonal accuracy, great tweeters that never get fatiguing, they just plain sound great
Cons:
Nope
2 out of 2 people found this helpful
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5 out of 5

Polk auto db651s

Written By PBXTech, Fork, MD. on Sunday, October 05, 2014
Crutchfield Customer Review (What's this?)
 
2012 2500 Ram Crew rear door replacements. These speakers are a definite improvement over the light 6"x9" factory units. Everything included to make this a 45 minute job start to finish. The speakers sound solid and clear, but an amp would take full advantage of their quality construction. The Polk db651s are Marine rated, so a bit of moisture inside the door shouldn't affect them.
Pros:
Good improvement over stock, quality components, Crutchfield supplies ALL needed hardware to install.
Cons:
At $65 per pair there is really no downside to these speakers.
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5 out of 5

Perfect fit for Jag XK8

Written By Roger, North Carolina on Friday, October 03, 2014
Crutchfield Customer Review (What's this?)
 
These speakers are a perfect fit replacement for both the front door and rear quarter panel speakers on a '97 Jag XK8. No mods needed - even the mounting holes line up perfectly with the factory holes. I can't say how much better they sound than the OEM speakers since those were blown, but they definitely sound great!
Pros:
Perfect fit!!!
Cons:
None
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5 out of 5

Nice Upgrade

Written By gmac, Roanoke, Va on Friday, October 03, 2014
Crutchfield Customer Review (What's this?)
 
Changed out a pair of front OEM speakers in a 2002 Lexus. A very significant improvement especially in voice quality. Great price, accessories to install and instructions too! Excellent overall purchase.
Pros:
Great value and quality. Easy install with included accessories.
Cons:
none
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5 out of 5

Great speakers

Written By Nathan, Cedar Creek TX 78612 on Thursday, October 02, 2014
Crutchfield Customer Review (What's this?)
 
I love these speakers! Put them in the front doors of a Corrolla. Amazing sound.
Pros:
Easy installation. Great sound and quality.
Cons:
None
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5 out of 5

Polk Audio db651s

Written By Anonymous, Callao, MO on Thursday, October 02, 2014
Crutchfield Customer Review (What's this?)
 
awesome product great sound installation was a breeze
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4 out of 5

Sounds better than factory

Written By dr d., walkerton, in on Thursday, October 02, 2014
Crutchfield Customer Review (What's this?)
 
Sounds better than factory, no real bass response but these are not designed for that good for mids and highs, hooked up to factory stereo and provides plenty of power to sound good
Pros:
good quality
Cons:
none
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1 out of 5

Speaker failed after 1 month

Written By corp, kansas on Monday, September 29, 2014
Crutchfield Customer Review (What's this?)
 
Speaker failed after a month in the door of my 03 Bonneville. The foam surround failed on both speakers. Was mounted according to instructions. Speaker was ran by a Pioneer MVH-X560BT Digital Media Receiver no amp.
Pros:
Sounded good for a little while.
Cons:
Failure after month replace with alpine component speakers.
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4 out of 5

Good Value

Written By Greg, Santa Maria CA on Sunday, September 28, 2014
Crutchfield Customer Review (What's this?)
 
The db651s were a good choice to replace my aging door speakers. They sound great and fit well. Installation was easy and the free harness connectors and mounting rings were much appreciated. No regrets on this purchase
Pros:
Good sound Good price Well made
Cons:
None
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5 out of 5

sound great in 3 different cars

Written By jeep grand cherokee, 23229 on Sunday, September 28, 2014
 
I replaced my 15 year old polk aftermarket speakers with the db651's and they sound even beget than the old ones. I expect these to last another 15 years.
Pros:
Great over all sound. If you expect your cat to shake from bass get a sub.
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1 out of 5

Polk Audio db651s

Written By Anonymous, Yorktown Hts, NY on Sunday, September 21, 2014
Crutchfield Customer Review (What's this?)
 
Absolutely zero bass. Completely dissatisfied. Huge downgrade from the cheap stock speakers.
Pros:
None
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5 out of 5

Excellent Sound without Amplification

Written By Anonymous, Missouri on Wednesday, September 10, 2014
Crutchfield Customer Review (What's this?)
 
By far the best overall speaker for the money!!
Pros:
Efficiency with internal crossover.
Cons:
Nothing.
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4 out of 5

Polk Speakers

Written By Don, Tonopah, NV on Monday, September 08, 2014
Crutchfield Customer Review (What's this?)
 
The speakers sound great. Contrary to other reviews, there is more than enough bass to satisfy most people. I suspect the people who are criticizing these speakers for lack of bass probably walk around with subwoofers wired to their ears. My only criticism of these speakers is the poor mounting design. Polk's engineers missed the boat on this one! They use four small machined screws to mount the speakers to your brackets. The tiny screw head fit into a C-shaped cut out rather than a hole or oval. Once you tighten them, you better hope they don't slip off the C slot or you have to remount them. Since these are mounted in a truck that will see bumpy desert roads, I'm not impressed with their ability to stand up over time. I had to go to the hardware store and spend $5 on longer screws and tiny washers just to make sure they stay mounted to the brackets. Then I trimmed off the excess screw shank with a Dremel cutoff wheel. If you can live with this, they're great speakers with decent sound.
Pros:
Speakers sound great.
Cons:
Factory mounting setup is pure garbage. You'll need longer screws of the same type and thin washers to keep the screw heads from slipping out of the cheesy C-shaped mounting "holes".
1 out of 1 people found this helpful
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4 out of 5

Fit with no alteration

Written By JustinG, Tennesee on Wednesday, September 03, 2014
Crutchfield Customer Review (What's this?)
 
So far I am pleased with my purchase. They were on sale so I feel that I got a good deal. I bought two pair to install in the doors of a ram quad cab. The magnet on these was bigger than the magnet on the stock 6x9's that came out of the front door, but smaller than the 6.5's that were in the rear doors. I am pleased with the sound. It is brighter an clearer than the stock speakers. They seem louder than the stock speakers. But I seem to get some harsh mids when really cranking the Alpine head unit. Another reviewer complained that these had no bass. They don't and you should not expect them to. I have some 10" polk subs that take care of the bass. One thing I did not like was the way the screw holes were built into the speaker. When tightening the screws it caused to surround to deform. I was not clamping down as tight as I would like. Install was a snap -- my 9-year old was able to get the stock speakers out and screwed the front door speaker in. You can see the gunmetal bronze cones behind the stock speaker grill, they look great. Thanks for the adaptor plates and plugs! That is why I tell my friends to buy from Crutchfield. I was able to get most of the speaker holes to line up with stock mounting holes. I only had to drill one out.
Pros:
Fits well, cool look. Bright clean highs. Free installation accessories from Crutchfield.
Cons:
Harsh when cranked up. When secured tightly with the screws provided the surround deformed.<